Well...the axles were definitely different. You can see in the pic that the wide part of the axle is about 1 1/2" longer so the ABS reluctor can grab it. they seemed to measure just about 1/16- 3/32 different in one of the length measurements so I was a tiny bit concerned. Then when I tried to install the passenger side one, it didn't want to go all the way in. I tried the old ones and they slid right in on both sides. But neither new one wanted to go all the way in on the passenger side. It felt like it was air pressure though; it wasn't hitting any metal. I used a quick clamp on it and it went in. It was just hard to push in for some reason. Weird. Once it was in though, it meshed and rotated fine. When I was installing the calipers, the driver side was tight and the axle didn't want to rotate easy. I was afraid it was the axle length. I started the truck after I filled the diff and put it in drive but that side wouldn't move unless I tapped the brake. I went ahead and installed the wheels and spacers and went for a drive. Everything seems fine; brakes work good and after a short drive the driver side seems to be OK; it wasn't too hot. I think the brake pad just needs to wear a bit if it hasn't already. But the best thing is the ABS, Traction Control, and Stabilitrack are all working and there's no more warning lights on. And I have disc brakes in the rear.
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